网络动态服务器-2-传递数据给应用

#coding=utf-8import socketimport sysfrom multiprocessing import Processimport reclass WSGIServer(object):    addressFamily = socket.AF_INET    socketType = socket.SOCK_STREAM    requestQueueSize = 5    def __init__(self, serverAddress):        #创建一个tcp套接字        self.listenSocket = socket.socket(self.addressFamily,self.socketType)        #允许重复使用上次的套接字绑定的port        self.listenSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)        #绑定        self.listenSocket.bind(serverAddress)        #变为被动，并制定队列的长度        self.listenSocket.listen(self.requestQueueSize)        self.servrName = "localhost"        self.serverPort = serverAddress[1]    def serveForever(self):        '循环运行web服务器，等待客户端的链接并为客户端服务'        while True:            #等待新客户端到来            self.clientSocket, client_address = self.listenSocket.accept()            #方法2，多进程服务器，并发服务器于多个客户端            newClientProcess = Process(target = self.handleRequest)            newClientProcess.start()            #因为创建的新进程中，会对这个套接字+1，所以需要在主进程中减去依次，即调用一次close            self.clientSocket.close()    def setApp(self, application):        '设置此WSGI服务器调用的应用程序入口函数'        self.application = application    def handleRequest(self):        '用一个新的进程，为一个客户端进行服务'        self.recvData = self.clientSocket.recv(2014)        requestHeaderLines = self.recvData.splitlines()        for line in requestHeaderLines:            print(line)        httpRequestMethodLine = requestHeaderLines[0]        getFileName = re.match("[^/]+(/[^ ]*)", httpRequestMethodLine).group(1)        print("file name is ===>%s"%getFileName) #for test        if getFileName[-3:] != ".py":            if getFileName == '/':                getFileName = documentRoot + "/index.html"            else:                getFileName = documentRoot + getFileName            print("file name is ===2>%s"%getFileName) #for test            try:                f = open(getFileName)            except IOError:                responseHeaderLines = "HTTP/1.1 404 not found\r\n"                responseHeaderLines += "\r\n"                responseBody = "====sorry ,file not found===="            else:                responseHeaderLines = "HTTP/1.1 200 OK\r\n"                responseHeaderLines += "\r\n"                responseBody = f.read()                f.close()            finally:                response = responseHeaderLines + responseBody                self.clientSocket.send(response)                self.clientSocket.close()        else:            #处理接收到的请求头            self.parseRequest()            #根据接收到的请求头构造环境变量字典            env = self.getEnviron()            #调用应用的相应方法，完成动态数据的获取            bodyContent = self.application(env, self.startResponse)            #组织数据发送给客户端            self.finishResponse(bodyContent)    def parseRequest(self):        '提取出客户端发送的request'        requestLine = self.recvData.splitlines()[0]        requestLine = requestLine.rstrip('\r\n')        self.requestMethod, self.path, self.requestVersion = requestLine.split(" ")    def getEnviron(self):        env = {}        env['wsgi.version']      = (1, 0)        env['wsgi.input']        = self.recvData        env['REQUEST_METHOD']    = self.requestMethod    # GET        env['PATH_INFO']         = self.path             # /index.html        return env    def startResponse(self, status, response_headers, exc_info=None):        serverHeaders = [            ('Date', 'Tue, 31 Mar 2016 10:11:12 GMT'),            ('Server', 'WSGIServer 0.2'),        ]        self.headers_set = [status, response_headers + serverHeaders]    def finishResponse(self, bodyContent):        try:            status, response_headers = self.headers_set            #response的第一行            response = 'HTTP/1.1 {status}\r\n'.format(status=status)            #response的其他头信息            for header in response_headers:                response += '{0}: {1}\r\n'.format(*header)            #添加一个换行，用来和body进行分开            response += '\r\n'            #添加发送的数据            for data in bodyContent:                response += data            self.clientSocket.send(response)        finally:            self.clientSocket.close()#设定服务器的端口serverAddr = (HOST, PORT) = '', 8888#设置服务器静态资源的路径documentRoot = './html'#设置服务器动态资源的路径pythonRoot = './wsgiPy'def makeServer(serverAddr, application):    server = WSGIServer(serverAddr)    server.setApp(application)    return serverdef main():    if len(sys.argv) < 2:        sys.exit('请按照要求，指定模块名称:应用名称,例如 module:callable')    #获取module:callable    appPath = sys.argv[1]    #根据冒号切割为module和callable    module, application = appPath.split(':')    #添加路径套sys.path    sys.path.insert(0, pythonRoot)    #动态导入module变量中指定的模块    module = __import__(module)    #获取module变量中制定的模块的application变量指定的属性    application = getattr(module, application)    httpd = makeServer(serverAddr, application)    print('WSGIServer: Serving HTTP on port {port} ...\n'.format(port=PORT))    httpd.serveForever()if __name__ == '__main__':    main()